BREDEL HOSE PUMPS

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BREDEL HOSE PUMPS
THE HEART
OF
THE MATTER
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Pagina 2
BREDEL:
MARKET LEADER IN
HEAVY DUTY HOSE PUMPS
Bredel Hose Pumps
adapted the hose pump
principle for industrial use
more than 30 years ago.
Today over 65,000 Bredel
heavy duty hose pumps,
with operating pressures
to 16 bar and flow rates to
80 m3/hour, work non-stop
all around the globe, usually
in applications where other
pumps simply cannot do
the job.
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Pagina 3
1
2
3
4
Inner layer in various types of rubber
Reinforced with layers of nylon
Outer layer precision-machined
Rough outer surface before processing
1
INNER
DIAMETER
(mm)
WALL
THICKNESS
(mm)
TOLERANCE OF
WALL THICKNESS
(± mm)
MAXIMUM
WORKING PRESSURE
(bar)
10
15
20
25
32
40
50
65
80
100
10.5
10.5
8.5
14.1
14.5
13.2
15.0
17.1
21.0
22.0
0.40
0.40
0.20
0.20
0.20
0.20
0.20
0.20
0.25
0.25
7.5
7.5
7.5
16
16
16
16
16
16
16
FLOW
VARIATION
DURING LIFE
±
±
±
±
±
±
±
±
±
±
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
THE HEART
OF
THE MATTER
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Pagina 4
handle
Industries which -sensitive
shear
viscous slurries, e fluids,
and abrasiv
ape r ,
such as pulp & p he
t
have discovered mps.
el pu
benefits of Bred
THE HOSE IS THE KEY
The essential component of
high-pressure hose pumps is a
hose that is constructed of layers
of rubber reinforced by winding
several layers of dyed nylon cords.
The inner and outer layers are extruded. The inner layer is available
in a range of rubber compounds.
Bredel combines the skills and
knowledge of rubber experts and
cord specialists to create the high
performance of the hoses.
2
3
4
Complex factors include:
• the vulcanisation properties
of the various types of rubber
compounds
• the properties and the application
of the nylon cord layers
• the numerous criteria the inner
layer must satisfy with respect to
the outer layer
• the mechanical and fatigue properties of the rubber compounds
• mechanical processing by means
of machining the hose
• optimising the lubricant and its
cooling properties
Bredel hoses have highpressure characteristics and precise
dimensions and give excellent
suction. The result: constant flow
under varying suction and discharge
conditions, and extraordinary ability
to handle viscous liquids.
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Pagina 5
BREDEL PUTS A LOT OF TIME AND EFFORT
INTO ITS HOSES
The life of a pump, the hose
and the pump drive are important
cost factors to industry. All are
affected by the hose's qualities:
its assembly, construction and,
especially, its precision machining.
Bredel has developed equipment
that automatically machines the
hose surface within fine tolerances,
guaranteeing compression, capacity,
efficiency and low
frictional resistance.
As a result, the load
on the pump and its
drive is minimised.
ONLY AT BREDEL
Even slight under-occlusion
allows damaging backflow, cutting
hose life and pumping efficiency.
The rotor's pressing shoes must fully
close the hose during compression.
This is achieved by fitting shims
under the shoes after considering
rotation speed, discharge pressure
and fluid temperature.
When the shimming is correct
for an application, no further adjustment is needed even when a hose
is replaced, because Bredel hoses
are consistent. They have constant
wall thickness and a uniform,
precisely specified surface.
handle corrosive
h
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w
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Ind
with high specific
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and
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pumping applicat
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Pagina 6
WHY A BREDEL
HIGH-PRESSURE
HOSE PUMP?
MACHINING AT BREDEL
Uniform occlusion of a hose
with irregular wall thickness is impossible. To prevent backflow, a
hose that has not been machined
must be shimmed on the basis of
the minimum thickness of the hose
wall - far more than is necessary to
achieve occlusion in regions with
thicker walls. If the wall thickness of
the hose varies only 1 mm, the life
of the hose is reduced by at least
25%. Excessive shimming could
result in forces that are almost three
times as high as necessary. And this
is always at the expense of the hose,
the pump, and the pump drive.
NATURAL RUBBER (NR)
Cis-Poly isoprene rubber.
Always your first choice.
A highly resilient material
with outstanding abrasion
resistance. Generally resistant
to diluted acids and alcohols.
Max. fluid temperature 80 ˚C*
Min. temperature -20 ˚C
BUNA N (NBR)
Acrylonitrile butadiene
rubber. Approved to FDA and
3A standards, this durable
material is resistant to oils,
greases, alkalis and detergents. It is suitable for a wide
range of applications in the
food industry.
Max. fluid temperature 80 ˚C*
Min. temperature -10 ˚C
Max. fluid temperature 90 ˚C*
Min. temperature -10 ˚C
Compression force (kN)
EPDM
Ethylene propylene diene
rubber. A product with excellent chemical resistance,
especially to ketones,
alcohols and concentrated
acids.
Compression force
15
10
5
A
B
Tolerance on wall thickness of hose
A + B Non-Bredel hose tolerance
B Bredel hose tolerance
HYPALON ® (CSM)
Chlorosuphonyl polyethylene
rubber. This type of rubber
has outstanding chemical
resistance to highly concentrated acids, bases, ozone,
and other oxidising materials.
Max. force non-Bredel hose
Min. force non-Bredel hose
Max. force Bredel hose
Min. force Bredel hose
Max. fluid temperature 80 ˚C*
Min. temperature -10 ˚C
* Your Bredel representative
will be pleased to give
you more details about
the use of these hoses for
temperatures up to 90 ˚C
and specific information
about the chemical
resistance of our hoses.
nsfer, sample
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and met
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Characteristics of our pumps
Easy to install and use; no shaft
seals, valves, diaphragms, pistons,
stators, or in-fluid rotating elements;
removing the risk of leaks, blockages,
corrosion and wear.
Trouble-free pumping of abrasive
slurries, corrosive acids, gaseous,
shear-sensitive and viscous fluids or
fluids with a high specific gravity.
The pump is reversible: the system
can easily be pumped out and any
blockages in the suction line can be
removed.
The yield is directly proportional
to the pump’s revolutions per
minute and independent of the inlet
pressure and discharge pressure
and the fluid viscosity. This results
in excellent metering qualities.
20
0
Because with the Bredel patented
technology, we achieved the
impossible: a durable product of
unbeatable simplicity and reliability.
Tens of thousands of pump users
know there’s no better hose pump
than a Bredel hose pump.
18500N
4000N
5500N
4000N
Safe dry running. Bredel pumps
do not need fluid in the hose for
cooling or lubrication and will suck
air intermittently or continuously
without risk of damage.
Self-priming, even with an underpressure of 0.95 bar (5 kPa.a; 0,05
bar.a).
Bredel pumps are hygienic, easy
to clean, and virtually maintenancefree.
No possible contamination of the
fluid to be pumped because it only
comes in contact with the hose. No
other type of positive-displacement
pump has this unique quality.
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abrasive
h
it
w
ng
li
a
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d
s
ie
Industr
aged media,
and easily dam ve switched
ha
such as b re w i n g , a wide scale.
on
to Bredel pumps
BREDEL TAKES THE GUESSWORK
OUT OF PUMPING
Hoses are the single most vital
component for the efficiency of a
hose pump. Traditionally, development of new rubber-related
products is done by ‘trial-and-error’
methods. This can often be a time-
SPECIAL BREDEL LUBRICANT
No high-pressure hose pump
can function without lubricant.
Bredel developed a lubricant for its
hoses and pumps that minimises
the friction between pressing shoe
and hose, and transfers frictional
heat to the pump housing. An additional advantage is that this lubricant is safe to use in the food
industry.
Pagina 7
consuming process. To shorten
development time, and therefore
save material and
money, Bredel Hose
Pumps developed a
finite element analysis
(FEA) simulation model.
We can model the optimum dimensions of the hose, the positions of
the reinforcing layers, the angles of
the cord layers and the thickness
of the cord and the intermediate
layers. In addition, the model helps
define the optimal shape of the
pressing shoe and the pump
housing. Thirty pumps are on nonstop laboratory test. If the pumps
and hoses meet the requirements
under the test conditions, they are
also extensively tested in real-life
situations.
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of Bredel pumps
BREDEL LISTENS TO
ITS CUSTOMERS
Bredel is the global
market leader in hose pumps.
Our Research & Development
Department works extensively to
improve our pumps, hoses and
accessories. The basis for this is the
continuous exchange of knowledge
with the users. An unprecedented
level of service, via a worldwide
dealer network completes Bredel’s
delivery capabilities.
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Pagina 8
Your representative:
Bredel Hose Pumps B.V.
A member of the Spirax-Sarco Engineering Group
292103860
Sluisstraat 7, P.O. Box 47, NL-7490 AA Delden.
The Netherlands.
Tel: +31 74 3770000. Fax: +31 74 3761175.
E-mail: [email protected]
Internet: www.bredel.com
Bredel: global supplier of industrial and high-pressure hose pumps.
Although the information in this publication has been compiled with the greatest possible care,
no rights can be derived from the information contained herein. Subject to alteration.
Bredel and SPX are registered trademarks.
Hypalon® is a registered trademark of DuPont Dow Elastomers.